book Maths Puzzle Numerical Ability

Lorna leaves Tyler on her moped at a rate of 24 km/h. One hour later, her roommmate Allison realizes she has forgotten her helmet and sets after her in car. How far will Allison ha

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12 = 2x squared + 5x

i tried to do a function box but i couldnt figure it out imissed that day of school but my teacher said to figure it out. could you explain the steps on how to do it? for example A=20 C=29